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2.5 legacy engine into impreza

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Old 09 July 2006, 01:40 PM
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scoob east
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Default 2.5 legacy engine into impreza

Ive come across a 2.5 legacy engine that has done a couple of shells,
it is a us spec engine, and my question is will the engine fit into an impreza, im only after the short block to match with my heads.
its gonna need a new crank etc,etc

also is this engine just as good as the newer impreza 2.5 engines, could i expect to see 400bhp with supporting mods

thanks
dale
Old 09 July 2006, 02:48 PM
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Leg@cy
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I've just had a STI 2.5 block put in my Legacy...........

tis only vice versa...... presumably ??
Old 09 July 2006, 05:47 PM
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scoob east
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cool, just wondering is the new sti block a closed deck block. or open deck
Old 09 July 2006, 05:54 PM
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dowser
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EJ25 is normally aspirated - wouldn't try to run it without changing pistons and rods. It's open deck.

After 3 long years I'm just fitting a phase 1 EJ25 ('97) in my scoob
Old 09 July 2006, 06:57 PM
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scoob east
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oh right is it possible to replace crank and rings and run it as a turbo engine?
Old 09 July 2006, 09:33 PM
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Leg@cy
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I was told mine was a Semi Closed Deck block...... How that works I don't know....

If it's not closed, then I spose it's open... he he

Mine had all new internals.... forged pistons and the like......
Old 10 July 2006, 07:55 AM
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dowser
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STi 2.5 block (EJ257) is semi-closed, older 2.5's were not.
Old 10 July 2006, 09:01 AM
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[Davey]
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Originally Posted by scoob east
oh right is it possible to replace crank and rings and run it as a turbo engine?
Crank & rings??

You'll need to change the pistons for low compression items and sort out fueling/management.
Old 10 July 2006, 08:37 PM
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scoob east
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yeah mate, i forgot ti mention pistons, would have to be forged, but this possible?
Old 10 July 2006, 09:21 PM
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Mark A
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I think it might work out more £ than a US STi 2.5
Old 10 July 2006, 10:29 PM
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scoob east
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well hopefully the engine should be almost free
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